<template>
	<view>
		<my-search @click="gotoSearch"></my-search>
		<view class="scrllo-view-container">
			<!-- 左侧滑动区域 -->
			<scroll-view class="left-scroll-view" scroll-y :style="{ height: wh + 'px' }">
				<block v-for="(item, i) in cateList" :key="i">
					<view :class="['left-scroll-view-item', i === active ? 'active' : '']" @click="activeChange(i)"> {{ item.cat_name }} </view>
				</block>
			</scroll-view>
			<!-- 右侧滑动区域 -->
			<scroll-view scroll-y :style="{ height: wh + 'px' }" :scroll-top="scrollTop">
				<view class="cate-v2" v-for="(item2, i2) in cateLevel2" :key="i2">
					<view class="cate-lv2-title">/{{ item2.cat_name }}/</view>
					<view class="cate-lv3-list">
						<view class="cate-lv3-item" v-for="(item3, i3) in item2.children" :key="i3" @click="gotoGoodList(item3)">
							<image :src="item3.cat_icon"></image> <text>{{ item3.cat_name }}</text>
						</view>
					</view>
				</view>
			</scroll-view>
		</view>
	</view>
</template>

<script>
import badgeMix from '@/mixins/tabbar-badge.js'

export default {
	// 将 badgeMix 混入到当前的页面中进行使用
	mixins: [badgeMix],
	// 省略其它代码...

	data() {
		return {
			wh: 0,
			cateList: [],
			active: 0,
			cateLevel2: [],
			scrollTop: 0
		}
	},
	async onLoad() {
		const sysInfo = await uni.getSystemInfo()
		this.wh = sysInfo[1].windowHeight -50

		this.getCateList()
	},
	methods: {
		async getCateList() {
			const { data: res } = await uni.$http.get('/api/public/v1/categories')
			// 判断是否获取失败
			if (res.meta.status !== 200) return uni.$showMsg()
			// 转存数据
			this.cateList = res.message
			this.cateLevel2 = res.message[0].children
		},
		activeChange(i) {
			this.active = i

			this.cateLevel2 = this.cateList[i].children
			this.scrollTop = this.scrollTop === 0 ? 1 : 0
		},
		gotoGoodList(item) {
			uni.navigateTo({
				url: '/subpkg/goods_list/goods_list?cid=' + item.cat_id
			})
		},
		gotoSearch(){
			uni.navigateTo({
				url:'/subpkg/search/search'
			})
		}
	}
}
</script>

<style lang="scss">
.scrllo-view-container {
	display: flex;
}

.left-scroll-view {
	width: 120px;

	.left-scroll-view-item {
		background-color: #f7f7f7;
		line-height: 60px;
		text-align: center;
		font-size: 12px;

		&.active {
			background-color: #ffffff;
			position: relative;

			&::before {
				content: ' ';
				display: block;
				width: 3px;
				height: 30px;
				background-color: #c00000;
				position: absolute;
				top: 50%;
				left: 0;
				transform: translateY(-50%);
			}
		}
	}
}

.cate-lv2-title {
	font-size: 12px;
	font-weight: bold;
	text-align: center;
	padding: 15px 0;
}

.cate-lv3-list {
	display: flex;
	flex-wrap: wrap;

	.cate-lv3-item {
		display: flex;
		flex-direction: column;
		width: 33.3%;
		justify-content: center;
		align-items: center;
		margin-bottom: 10px;

		image {
			width: 60px;
			height: 60px;
		}

		text {
			font-size: 12px;
		}
	}
}


</style>
